how do you open that? okay, did you look at your briefing card? do you know how the exit opens? i don t know. did you know there was an exit behind you? no. reporter: in 20 second i made three common mistakes that could me and others killed. in little rock, 134 out of 135 people surp vifd. including one man who scrambled out with the seat still on his back. he crawled away from the airplane. it wasn t up tintil he got to t area he realized he hadn t unfastened his seatbelt. when it is taking off and landed. if you do that, and there is an if pact on takeoff or landing. having it belted tightly will keep you from being thrown around. the seat absorbs much of thenner jeep of the impact. minutes after the asiana flight 214 crashed, first responders rushed to help. they saved a lot of lives.